nanotechnology

Nanotechnology is in something of a bind. The ideas that make nanotechnology interesting (super small scale machines, self replication, etc.) are nowhere near being implemented. They aren't even major targets for research money.

A lot of things work on a nanometer scale but it isn't clear to me that combining these concepts under a single heading is particularly useful. Its like defining indigotech as "technology concerning devices visible at wavelengths of about 445 nm". You could probably come up with a lot of interesting devices for this category but it wouldn't make studying indigotech worthwhile.